CVE-2026-45504

HIGH

Microsoft Exchange Server Elevation of Privilege Vulnerability

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-45504. PoCs published by hawktrace.

AI-analyzed exploit summary This repository contains a functional Python exploit for CVE-2026-45504, which targets a file read vulnerability in Microsoft Exchange via SSRF. The exploit authenticates to OWA, creates a malicious attachment, and reads arbitrary files from the target system.

Description

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Exploits (1)

github WORKING POC 3 stars
by hawktrace · pythonpoc
https://github.com/hawktrace/CVE-2026-45504

This repository contains a functional Python exploit for CVE-2026-45504, which targets a file read vulnerability in Microsoft Exchange via SSRF. The exploit authenticates to OWA, creates a malicious attachment, and reads arbitrary files from the target system.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Exchange
Auth required
Prerequisites: valid Exchange credentials · network access to target · attacker-controlled server for SSRF callback
mistral-large-3 · analyzed Jun 24, 2026 Full analysis →

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft Exchange Server Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45504

Scores

CVSS v3 8.8
EPSS 0.0085
EPSS Percentile 54.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-918
Status published
Products (12)
microsoft/exchange_server 2016 cumulative_update_23
microsoft/exchange_server 2019 cumulative_update_14 (2 CPE variants)
microsoft/exchange_server < 15.02.2562.043
microsoft/exchange_server_subscription_edition < 15.02.2562.043
Microsoft/Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0.0 - 15.01.2507.069
Microsoft/Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0.0 - 15.01.2507.071
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0 - 15.02.1544.041
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0 - 15.02.1544.043
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0 - 15.02.1748.046
Microsoft/Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0 - 15.02.1748.048
... and 2 more
Published Jun 09, 2026
Tracked Since Jun 09, 2026